| Subject | English | Spanish |
| comp., MS | accounts payable three-way invoice matching | conciliación triple de facturas de proveedores (A practice of matching vendor invoice prices and product quantities to purchase orders and product receipts) |
| transp., industr. | closed-loop three-way catalyst | catalizador de circuito cerrado de tres vías |
| transp., environ. | closed-loop three-way catalytic converter | convertidor catalítico de tres vías con bucle cerrado |
| transp., mech.eng. | oxidation or three-way catalyst | convertidor catalítico de tres vías |
| transp. | three divided highways within one right of way | carretera dividida |
| transp. | three divided highways within one right of way | carretera dual |
| transp. | three divided highways within one right of way | vía con tres calzadas separadas |
| transp. | three divided highways within one right of way | carretera doble |
| transp. | three divided highways within one right of way | carretera de dos vías |
| transp. | three divided highways within one right of way | carretera con tres calzadas separadas |
| agric. | three way tipping trailer | basculante hacia tres costados |
| agric. | three-way bagging attachment | triple boca de ensaque |
| commun., IT | three-way calling | llamada tripartita |
| transp., mech.eng. | three-way catalyser | convertidor catalítico con tres vías |
| environ. | three-way catalyser | catalizador de tres vías |
| transp., industr. | three-way catalyst | catalizador de circuito cerrado de tres vías |
| transp., mech.eng. | three-way catalytic converter | convertidor catalítico con tres vías |
| UN, clim. | three-way catalytic converter | convertidor catalítico de tres vías |
| UN, clim. | three-way catalytic converter | convertidor catalítico de efecto triple |
| environ. | three-way catalytic converter | catalizador de tres vías |
| transp., industr. | three-way catalytic convertor | catalizador de triple acción |
| mech.eng. | three-way cock | llave de tres vías |
| mech.eng. | three-way cock | válvula de tres vías |
| tech. | three-way cock | grifo de tres conductos |
| transp., industr. | three-way converter | catalizador de triple acción |
| auto. | three-way converter | catalizador de tres vías |
| auto. | three-way converter | convertidor de tres vías |
| mater.sc. | three-way corner | esquina de tres caminos |
| forestr. | three-way cross | híbrido de tres líneas |
| forestr. | three-way cross | híbrido de tres vías |
| med. | three-way-cross hybrid | híbrido de tres vias |
| anim.husb. | three-way crossing | cruzamiento triple |
| tech. | three-way dump body | caja de volquete de descarga por tres lados |
| forestr. | three-way hybrid | híbrido de tres líneas |
| forestr. | three-way hybrid | híbrido de tres vías |
| commun., IT | three-way internal conference call | conferencia local tripartita |
| el. | three-way light switch | interruptor de dos puntos |
| el. | three-way light switch | doble interruptor |
| comp., MS | three-way matching policy | directiva de triple conciliación (A matching policy that requires one or more vendor invoice prices to match with one or more purchase order prices and that requires one or more vendor invoice quantities to match with one or more product receipt quantities) |
| gen. | three-way partnership | cooperación tripartita |
| gen. | three-way partnership | cooperación triangular |
| mech.eng. | three-way pipe | tubo en pantalón |
| chem. | three-way pipe | tubo de tres vías |
| mech.eng. | three-way restrictor | reductor de tres vías |
| mech.eng. | three-way restrictor | reductor de 3 vías |
| mech.eng. | three-way selector | selector de tres vías |
| mech.eng. | three-way selector | selector de 3 vías |
| el. | three-way speaker | altavoz de tres vías |
| mech.eng. | three-way stopcock | válvula de tres vías |
| mech.eng. | three-way stopcock | llave de tres vías |
| tech. | three-way switch | interruptor de tres posiciones |
| mech.eng. | three-way tap | válvula de tres vías |
| mech.eng. | three-way tap | llave de tres vías |
| construct. | three-way tipper | volquete trilateral |
| transp. | three-way tipping trailer | remolque basculante hacia los tres costados |
| nat.sc., agric. | three-way tipping 4-wheeled trailer | remolque basculante trilateral |
| tech. | three-way valve | válvula de tres conductores |
| mech.eng. | three-way valve | válvula de tres vías |
| earth.sc., mech.eng. | three-way valve | servoválvula de tres vías |
| mech.eng. | three-way valve | llave de tres vías |
| tech. | three-way valve | válvula de paso triple |